Sexy Open-Back Long Formal Dress: Atria 6852HSlip into this sexy long formal dress 6852H and feel like your'e wearing nothing at all. So comfy for prom, galas, and other black tie events, this tight long dance dress features a gathered sweetheart neckline with thin shoulder straps that lace up over the open back for the best fit. Offered in misses and some plus sizes, this long evening gown has a hip hugging skirt with booty contouring ruching, a thigh high side slit and a small train that